package com.xialing.util;

import com.xialing.model.LoginUser;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;

import java.util.Date;

/**
 * @Author: xialing
 * @Description
 */
@Slf4j
public class JWTUtil {


    /**
     * 主题
     */
    private static final String SUBJECT = "xialing";

    /**
     * 加密密钥
     */
    private static final String SECRET = "xialing.net168";

    /**
     * 令牌前缀
     */
    private static final String TOKNE_PREFIX = "dcloud-link";


    /**
     * token过期时间，7天
     */
    private static final long EXPIRED = 1000 * 60 * 60 * 24 * 7;



    public static String geneJsonWebToken(LoginUser loginUser) {
        if (loginUser == null) {
            throw new NullPointerException("用户信息不能为空");
        }

        String token = Jwts.builder().setSubject(SUBJECT)
                .claim("head_img", loginUser.getHeadImg())
                .claim("account_no", loginUser.getAccountNo())
                .claim("username", loginUser.getUsername())
                .claim("mail", loginUser.getMail())
                .claim("phone", loginUser.getPhone())
                .claim("auth", loginUser.getAuth())
                .setIssuedAt(new Date())
                .setExpiration(new Date(CommonUtil.getCurrentTimestamp() + EXPIRED))
                .signWith(SignatureAlgorithm.HS256, SECRET).compact();

        token = TOKNE_PREFIX + token;
        log.info("生成token={}", token);

        return token;

    }

    public static Claims checkJWT(String token) {

        try {
            final Claims claims = Jwts.parser().setSigningKey(SECRET)
                    .parseClaimsJws(token.replace(TOKNE_PREFIX, "")).getBody();

            return claims;
        } catch (Exception e) {
            log.error("解析token异常:{}", e.getMessage());
            return null;
        }

    }

}
